You are correct, it was in a slightly crouched position so that's probably why it looks misshapen.Black Redstart then? Colouration, including the right warm olivebrown ear-coverts would fit, but shape seems off for this species
YesChiffchaff?
YesGolden Eagle?
Correct! Now get back to work!Brambling, chaffinch, siskin, greenfinch and (edit) house sparrow, goldfinch.
YesHawfinch?
I saw it in France, they are much more common over there.Luckyyyyyyyyyy
YesCommon Tern?